Improvement in rolls for rolling horseshoe-bars



UNITED STATES PATENT OEEIcE.

EBENEZER GATE, OF EAST WOBURN, MASSACHUSETTS.

IMPROVEMENT IN ROLLS FOR ROLLING HORSESHOE-BARS.

Specilication forming part of Letters Patent N0. 113,255, dated April 4,1871.

To all whom fit may concern:

Be it known thatI, EBENEzE-n GATE, of East Woburn, in the county ofMiddlesex and State of Massachusetts, have invented a new and ImprovedMachine for Rolling Horseshoe-Iron; and I do hereby declare thefollowing to be a full, clear, and exact description of the same,reference being had to the accompanying drawing, forming part of thisspecification, in which- Figure l is au end view of the rollers. Fig. 2is a side elevation of the same; and Figs. 3 and 4 representcross-sections of the rolled iron, the former taken midway between thetoe and heel of the shoe that is to be made, and the latter across thetoe or heel.

Similar letters of reference indicate corresponding parts in the severalfigures of the drawing.

Letters Patent were granted to me April 5, 1870, No. 101,581, for animproved horseshoe, and May 10, 187 0, No. 102,775, for an improved barfor manufacturing said shoe.

The peculiarity of my horseshoe consisted in such a construction that across-section taken through the toe or either extremity of the heelwould show the form represented in Fig. 4, while a similar section takenmidway between the toe and heel on either side would show. the formrepresented in Fig. 3; in other words, the inner edge ot' the shoe wasformed thin and flat, while the nail-groove in the under side onlyextended along the sides of the shoe, and was cut deep, leaving a narrowridge of metal, a a, Fig. 3, on either side of it. My theory was, thatinasmuch as greater wear cornes upon the toe and heel of a horseshoethan along the sides, the tendency to wear unevenly should becounteracted by making the parts a a thin, so that they would wear awaymore rapidly than the heel or toe, where the metal is left flat andsmooth. Practical experiment having ldemonstrated my theory to becorrect, I applied for and obtained Letters Patent, as aforesaid, bothupon the shoe and the manufactured bar, which, when bent into the propercurve, forms the shoe.

My present invention relates to a machine for rollin g said bar so as toproperly form the short nailgrooves and the thin ridges on'either sideof them with the ilat thin inner edge of the shoe, as already patented.

The invention consists, not in combining two rollers for rollinghorseshoes, nor in constructing rollers with dies or projections forcutting the nailgrooves of a horseshoe,` but in the specific form andcombination of' rollers and dies shown in my drawing and hereinafterdescribed, for the purpose of obviating certain insuperable difficultieswhich have been experienced in attempting to apply any of the oldhorseshoe-rolling machines to the manufacture of my improved shoe orbar.

The main difficulty to which I refer results from the fact that to carryout my theory the combined surface of the two ridges a a must berelatively less than the surface of the at ungrooved portion of the shoeat b, Fig. 4; in other words, it does not answer to simply cut thegroove by means of a die on the roller D E, for that would only splitthe surface in two, leaving the sum of the two equal to the ungroovedsurface b. A form of die or roller must therefore be employed that willrmly brace the raised metal at the points e e', so that it cannot bedisplaced laterally, leaving the die to plow out the deep nail-groove nby pushing the displaced metal before it until, by the elongation of thebar, or the compression of the metal, room is found to receive it.

In the drawing, A represents a cylindrical or slightly-taperin g rollerhaving two flanges, C C. D E is another roller, formed with acylindrical surface, E, on which are arranged the dies F F, that cut thenail-grooves, and also, if thought desirable, a marker, H, midwaybetween the dies, for the purpose of indicating Where the rolled barshould be cut to separate the shoe-blanks.

The parts D E iit accurately into the groove between the flanges C C',so as to prevent the escape of the metal laterally. The part D is madewith curved outline, as clearly shown in Fig. 2, which projects beyondthe perimeter of the part E and molds the thin at inner edge of theshoe, while at the same time the shoulder l braces firmly against theraised portion constituting the outer edge of the shoe, and effectuallyprevents the slightest lateral displacement ofthe metal while the dies FF are plowing through it.

The whole bar is held in place during its passage through the machinenot only by the flanges O (l, but also by the shoulder Z and the curvedform of the part D.

The form of the rollers is such as, while in operation, to force themetal toward that side ofthe shoe which is to be its bearing-surface,and compress it to e condition of greet cornpactness along that part,whereby it lasts much longer than if it Were formed otherwise.

Having thus described my invention, Whatf I claim es new is- The rollerconsisting of the parts D E F F,

each constructed in the form and arranged in the manner herein setforth, when combined with the roller A C G', constructed 'es described,for the purposes herein specified.

v EBENEZER GATE. Witnesses:

J. DENNIS, Jr., FRED. ARTos.

